BMW E90 LCI F10 F30 Fuel Injection Rail High Pressure Pipe N57 Diesel 7800124

BMW E90 LCI F10 F30 Fuel Rail Diesel Injector Rail N57 7800124 is an original component of the diesel engine fuel system, designed for BMW N57 diesel engines. The fuel rail is responsible for the stable distribution of fuel to the injectors, which is crucial for engine smoothness, performance, and fuel consumption.

Specifications and technical data

• SKU: 7805423-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805423
• Substitutable numbers: 13537805423, 7805423, 13537800124, 7800124
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Function of the BMW N57 Fuel Rail

The presented fuel rail is a component of the common rail system in BMW N57 engines, fitted in series such as E90 LCI, F10, and F30. Its task is to maintain proper fuel pressure and ensure uniform supply to all injectors, which translates to correct mixture combustion and stable engine operation.

In high-pressure diesel systems, even minor leaks or disruptions in the fuel rail's operation can lead to power loss, rough idling, or increased smoke. Using an original fuel rail helps maintain the factory parameters of the fuel system and reduces the risk of costly damage to other components.

Construction and Advantages of the Original Fuel Rail

The fuel rail for the N57 engine has been designed by BMW for operation under the high pressures typical of modern diesel units. Its construction ensures:

• appropriate body stiffness – reduces pressure pulsations and improves fuel delivery stability,
• precisely machined connection seats – facilitate a leak-free installation of high-pressure lines and injectors,
• compatibility with the N57 engine control system – works with the factory injection strategy, without the need for software modifications.

By using an original part from the Injector Nozzles category, compatibility with the factory engine equipment is maintained, which is important for both durability and correct computer diagnostics.

Condition, Installation, and Application in Diesel Engines

The fuel rail is a used, original BMW part obtained from disassembly. It is a good solution for users who want to restore the functionality of their diesel engine's fuel system while keeping service costs reasonable, and at the same time avoid the risks associated with unreliable aftermarket parts.

When installing the fuel rail in an N57 engine, it is recommended to:

• check the condition of the high-pressure lines and injectors,
• use new seals in accordance with the manufacturer's guidelines,
• properly tighten the connections using the correct torque values to avoid micro-leaks.

A correctly installed fuel rail supports stable fuel pressure across the entire load range, which directly impacts the dynamics, smoothness, and emissions of the diesel engine.

Injector System Diagnostics and Prevention

In case of problems with the diesel fuel system – such as starting difficulties, power loss, or rough running – it is advisable to perform comprehensive diagnostics of the fuel rail and injectors. A detailed discussion of the symptoms and consequences of neglect can be found in the article Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which helps to better understand the relationships between component condition and engine operation.

For those interested in the characteristics and operation of BMW diesel engines, the comparative material BMW N47 vs M57 / M57N / M57N2 – A Ranking of Legendary Diesels may also be useful, allowing for a better assessment of the specifics of different units and their servicing costs on the secondary market.

Other BMW Injector Nozzles

If you are also looking for other BMW injector nozzles for your car, check out our dedicated offer: BMW injector nozzles. This will allow you to easily select fuel system components tailored to your specific model and engine type.